MY108517A - Increasing options in mapping rom in computer memory space - Google Patents

Increasing options in mapping rom in computer memory space

Info

Publication number
MY108517A
MY108517A MYPI89001716A MYPI19891716A MY108517A MY 108517 A MY108517 A MY 108517A MY PI89001716 A MYPI89001716 A MY PI89001716A MY PI19891716 A MYPI19891716 A MY PI19891716A MY 108517 A MY108517 A MY 108517A
Authority
MY
Malaysia
Prior art keywords
page
segment
read
stored
field
Prior art date
Application number
MYPI89001716A
Inventor
W Voorhees Richard
Ellen Morel Jeanne
Steven Keener Don
Frederick Bush Gregory
Original Assignee
Ibm
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ibm filed Critical Ibm
Publication of MY108517A publication Critical patent/MY108517A/en

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication
    • G06F12/0646—Configuration or reconfiguration
    • G06F12/0653—Configuration or reconfiguration with centralised address assignment
    • G06F12/0661—Configuration or reconfiguration with centralised address assignment and decentralised selection
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F12/00—Accessing, addressing or allocating within memory systems or architectures
    • G06F12/02—Addressing or allocation; Relocation
    • G06F12/06—Addressing a physical block of locations, e.g. base addressing, module addressing, memory dedication

Abstract

IN ORDER TO MORE EFFECTIVELY USE READ ONLY MEMORY SPACE OF A PERSONAL COMPUTER SYSTEM, ROM CODE IS SELECTIVELY LOCATED OR MAPPED TO EITHER AN ADDRESS BOUNDARY WHICH IS AN EVEN OR ODD INTEGER MULTIPLE OF ONE HALF THE CAPACITY OF THE READ ONLY MEMORY DEVICE IN WHICH THE ROM CODE IS STORED. THE ROM CODE IS STORED IN THE READ ONLY MEMORY DEVICE IN TWO FIELDS. IN A FIRST FIELD, THE ROM CODE IS BROKEN UP INTO TWO SEGMENTS, AND THE FIRST SEGMENT PRECEDES THE SECOND SEGMENT. IN THE SECOND FIELD, THE SAME TWO SEGMENTS ARE STORED, BUT THE SECOND SEGMENT IS STORED PRECEDING THE FIRST SEGMENT. A REGISTER, FOR STORING PAGE SELECT BITS, PROVIDES AN INPUT TO AN ADDRESS DECODER AND AN INPUT TO AN ADDER, WHICH ADDS UNITY TO THE CONTENTS OF THE REGISTER AND PROVIDES ITS OUTPUTS TO THE ADDRESS DECODER AS WELL. ACCORDINGLY, THE ADDRESS DECODER WILL RESPOND TO EITHER THE PAGE WHICH IS IDENTIFIED BY THE PAGE SELECT BITS OR THE PAGE FOLLOWING THE IDENTIFIED PAGE. THE LSB OF THE PAGE SELECT BITS IS USED IN ADDRESSING THE READ ONLY MEMORY DEVICE TO SELECT BETWEEN THE FIRST FIELD (SELECTED WHEN THE LSB IS ZERO) OF THE SECOND FIELD (SELECTED WHEN THE LSB IS UNITY). (FIG. 1)
MYPI89001716A 1988-12-09 1989-12-06 Increasing options in mapping rom in computer memory space MY108517A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/281,612 US4979148A (en) 1988-12-09 1988-12-09 Increasing options in mapping ROM in computer memory space

Publications (1)

Publication Number Publication Date
MY108517A true MY108517A (en) 1996-10-31

Family

ID=23078043

Family Applications (1)

Application Number Title Priority Date Filing Date
MYPI89001716A MY108517A (en) 1988-12-09 1989-12-06 Increasing options in mapping rom in computer memory space

Country Status (14)

Country Link
US (1) US4979148A (en)
EP (1) EP0372841B1 (en)
JP (1) JPH0743669B2 (en)
KR (1) KR920005289B1 (en)
CN (1) CN1014839B (en)
AR (1) AR245832A1 (en)
AU (1) AU623457B2 (en)
BR (1) BR8906348A (en)
CA (1) CA2000009C (en)
DE (2) DE68923433T2 (en)
GB (1) GB2225884A (en)
MY (1) MY108517A (en)
NZ (1) NZ231639A (en)
PH (1) PH26617A (en)

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EP0769746A1 (en) * 1995-10-20 1997-04-23 Symbios Logic Inc. Storage device and method accessing it
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US7013340B1 (en) 2000-05-18 2006-03-14 Microsoft Corporation Postback input handling by server-side control objects
US6763453B2 (en) * 2000-12-28 2004-07-13 Intel Corporation Security on hardware loops
US7380250B2 (en) 2001-03-16 2008-05-27 Microsoft Corporation Method and system for interacting with devices having different capabilities
US7493397B1 (en) 2001-06-06 2009-02-17 Microsoft Corporation Providing remote processing services over a distributed communications network
US6944797B1 (en) 2001-06-07 2005-09-13 Microsoft Corporation Method and system for tracing
US6915454B1 (en) 2001-06-12 2005-07-05 Microsoft Corporation Web controls validation
US7162723B2 (en) * 2001-06-29 2007-01-09 Microsoft Corporation ASP.NET HTTP runtime
US7594001B1 (en) 2001-07-06 2009-09-22 Microsoft Corporation Partial page output caching
US7216294B2 (en) 2001-09-04 2007-05-08 Microsoft Corporation Method and system for predicting optimal HTML structure without look-ahead
US7428725B2 (en) 2001-11-20 2008-09-23 Microsoft Corporation Inserting devices specific content
US7574653B2 (en) 2002-10-11 2009-08-11 Microsoft Corporation Adaptive image formatting control
US7596782B2 (en) 2003-10-24 2009-09-29 Microsoft Corporation Software build extensibility
US7890604B2 (en) 2004-05-07 2011-02-15 Microsoft Corproation Client-side callbacks to server events
US8065600B2 (en) 2004-05-14 2011-11-22 Microsoft Corporation Systems and methods for defining web content navigation
US7464386B2 (en) 2004-05-17 2008-12-09 Microsoft Corporation Data controls architecture
US8156448B2 (en) 2004-05-28 2012-04-10 Microsoft Corporation Site navigation and site navigation data source
US7530058B2 (en) 2004-05-28 2009-05-05 Microsoft Corporation Non-compile pages

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US3440615A (en) * 1966-08-22 1969-04-22 Ibm Overlapping boundary storage
US3921144A (en) * 1971-05-18 1975-11-18 Ibm Odd/even boundary address alignment system
US4037215A (en) * 1976-04-30 1977-07-19 International Business Machines Corporation Key controlled address relocation translation system
US4374411A (en) * 1980-02-14 1983-02-15 Hayes Microcomputer Products, Inc. Relocatable read only memory
US4378591A (en) * 1980-12-31 1983-03-29 Honeywell Information Systems Inc. Memory management unit for developing multiple physical addresses in parallel for use in a cache memory
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US4443847A (en) * 1981-02-05 1984-04-17 International Business Machines Corporation Page addressing mechanism
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US4675808A (en) * 1983-08-08 1987-06-23 American Telephone And Telegraph Company At&T Bell Laboratories Multiplexed-address interface for addressing memories of various sizes
NZ209664A (en) * 1983-09-29 1987-05-29 Tandem Computers Inc Memory board address assignments: automatic reconfiguration
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DE3586557D1 (en) * 1984-10-26 1992-10-01 Ibm DATA PROCESSING DEVICE WITH FIXED ADDRESS SPACE AND VARIABLE MEMORY.
US4744053A (en) * 1985-07-22 1988-05-10 General Instrument Corp. ROM with mask programmable page configuration
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Also Published As

Publication number Publication date
AU623457B2 (en) 1992-05-14
EP0372841A2 (en) 1990-06-13
EP0372841A3 (en) 1991-06-12
CN1014839B (en) 1991-11-20
PH26617A (en) 1992-08-19
CN1043401A (en) 1990-06-27
US4979148A (en) 1990-12-18
BR8906348A (en) 1990-08-21
DE68923433D1 (en) 1995-08-17
GB2225884A (en) 1990-06-13
NZ231639A (en) 1992-03-26
EP0372841B1 (en) 1995-07-12
CA2000009C (en) 1994-02-01
JPH0743669B2 (en) 1995-05-15
KR910012925A (en) 1991-08-08
JPH02201669A (en) 1990-08-09
DE68923433T2 (en) 1996-03-07
KR920005289B1 (en) 1992-06-29
AU4609089A (en) 1990-06-14
GB8927950D0 (en) 1990-02-14
DE3940302C2 (en) 1993-02-25
DE3940302A1 (en) 1990-06-13
CA2000009A1 (en) 1990-06-09
AR245832A1 (en) 1994-02-28

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